Adjustable duct bracket



FIG. 1 is a perspective view of an adjustable duct bracket showing my new design;

FIG. 2 is a top plan view of the adjustable duct bracket of FIG. 1;

FIG. 3 is a front elevational view of FIG. 2;

FIG. 4 is a bottom plan view of FIG. 2; and,

FIG. 5 is a right side elevational view of FIG. 2, the left side being a mirror image thereof. 

The ornamental design for an adjustable duct bracket, as shown and described. 